Grid lines in table not visible

Steps to Reproduce

1. Open the URL https://skill-search.topcoder-dev.com/ and login
2. Select some filter and get results
3. Click edit button for some user
4. Observe Table grid lines in dialog

Screenshots/Video

Actual Result(s)

Grid lines (horizontal) disappear

Expected Result(s)

All grid lines in table should be there

Environment Details

Browser(s): Firefox 78.0.1 (64-bit)

Final Submission Guidelines

Git issue link: https://github.com/topcoder-platform/u-bahn-app/issues/41